AD645CCHIPS

更新时间： 2024-11-29 13:05:23

品牌	Logo	应用领域
亚德诺 - ADI		运算放大器
页数	文件大小	规格书
8页	441K
描述
IC OP-AMP, 300 uV OFFSET-MAX, 2 MHz BAND WIDTH, UUC, DIE, Operational Amplifier

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AD645CCHIPS 数据手册

Low Noise, Low Drift

FET Op Amp

AD645

FEATURES

CONNECTION DIAGRAMS

Improved Replacement for Burr-Brown

OPA-111 and OPA-121 Op Amp

TO-99 (H) Package

8-Pin Plastic Mini-DIP

(N) Package

CASE

LOW NOISE

2 ␮V p-p max, 0.1 Hz to 10 Hz

10 nV/√Hz max at 10 kHz

11 fA p-p Current Noise 0.1 Hz to 10 Hz

OFFSET

NULL

OFFSET

NULL

AD645

–IN

– IN

OUTPUT

HIGH DC ACCURACY

250 ␮V max Offset Voltage

1 ␮V/؇C max Drift

1.5 pA max Input Bias Current

114 dB Open-Loop Gain

Available in Plastic Mini-DIP, 8-Pin Header Packages, or

Chip Form

+IN

OUTPUT

AD645

OFFSET

NULL

OFFSET

NULL

+IN

TOP VIEW

–V

–

NC = NO CONNECT

NOTE: CASE IS CONNECTED

TO PIN 8

The AD645 is available in six performance grades. The AD645J

and AD645K are rated over the commercial temperature range

of 0°C to +70°C. The AD645A, AD645B, and the ultra-

precision AD645C are rated over the industrial temperature

range of –40°C to +85°C. The AD645S is rated over the military

temperature range of –55°C to +125°C and is available

processed to MIL-STD-883B.

APPLICATIONS

Low Noise Photodiode Preamps

CT Scanners

Precision I-V Converters

PRODUCT DESCRIPTION

The AD645 is available in an 8-pin plastic mini-DIP, 8-pin

header, or in die form.

The AD645 is a low noise, precision FET input op amp. It of-

fers the pico amp level input currents of a FET input device

coupled with offset drift and input voltage noise comparable to a

high performance bipolar input amplifier.

PRODUCT HIGHLIGHTS

1. Guaranteed and tested low frequency noise of 2 µV p-p max

and 20 nV/√Hz at 100 Hz makes the AD645C ideal for low

noise applications where a FET input op amp is needed.

The AD645 has been improved to offer the lowest offset drift in

a FET op amp, 1 µV/°C. Offset voltage drift is measured and

trimmed at wafer level for the lowest cost possible. An inher-

ently low noise architecture and advanced manufacturing tech-

niques result in a device with a guaranteed low input voltage

noise of 2 µV p-p, 0.1 Hz to 10 Hz. This level of dc performance

along with low input currents make the AD645 an excellent

choice for high impedance applications where stability is of

prime concern.

2. Low V_OSdrift of 1 µV/°C max makes the AD645C an excel-

lent choice for applications requiring ultimate stability.

3. Low input bias current and current noise (11 fA p-p 0.1 Hz to

10 Hz) allow the AD645 to be used as a high precision

preamp for current output sensors such as photodiodes, or as

a buffer for high source impedance voltage output sensors.

100

1.0

–2.5 –2.0 –1.5 –1.0 –0.5

0.0

0.5

1.0

1.5

2.0

2.5

100

10k

FREQUENCY – Hz

INPUT OFFSET VOLTAGE DRIFT– µV/

°C

Figure 1. AD645 Voltage Noise Spectral Density vs.

Frequency

Figure 2. Typical Distribution of Average Input Offset

Voltage Drift (196 Units)

REV. B

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

12 3 4 5 6 7 8

中文翻译

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与AD645CCHIPS相关器件

型号	品牌	获取价格	描述	数据表
AD645CH	ADI	获取价格	Low Noise, Low Drift FET Op Amp
AD645J	ADI	获取价格	Low Noise, Low Drift FET Op Amp
AD645JCHIPS	ADI	获取价格	IC OP-AMP, 1000 uV OFFSET-MAX, 2 MHz BAND WIDTH, UUC, DIE, Operational Amplifier
AD645JN	ADI	获取价格	Low Noise, Low Drift FET Op Amp
AD645K	ADI	获取价格	Low Noise, Low Drift FET Op Amp
AD645KCHIPS	ADI	获取价格	IC OP-AMP, 400 uV OFFSET-MAX, 2 MHz BAND WIDTH, UUC, DIE, Operational Amplifier
AD645KN	ADI	获取价格	Low Noise, Low Drift FET Op Amp
AD645S	ADI	获取价格	Low Noise, Low Drift FET Op Amp
AD645SCHIPS	ADI	获取价格	IC OP-AMP, 1500 uV OFFSET-MAX, 2 MHz BAND WIDTH, UUC, DIE, Operational Amplifier
AD645SH	ETC	获取价格	Operational Amplifier

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